<template>

  <div class="app-container">

    <h2 style="text-align: center;">发布新课程</h2>

    <el-steps :active="3" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="发布课程"/>
    </el-steps>
    <!--详细信息-->
    <div class="ccInfo">
      <img :src="courseInfo.cover">
      <div class="main">
        <h2>{{ courseInfo.courseTitle }}</h2>
        <p class="gray"><span>共{{ courseInfo.lessonNum }}课时</span></p>
        <p><span>所属分类：{{ courseInfo.oneSubject }} — {{ courseInfo.twoSubject }}</span></p>
        <p>课程讲师：{{ courseInfo.teacherName }}</p>
        <h3 class="red">￥{{ courseInfo.price }}</h3>
      </div>
    </div>

    <div>
      <el-button @click="$router.push({path: `/course/info/${id}`})">返回修改</el-button>
      <el-button :disabled="saveBtnDisabled" type="primary" @click="issueCourse">发布课程</el-button>
    </div>
  </div>
</template>

<script>
import {findDetailedInfoById, publishCourse} from '@/api/course/course'

export default {
  name: "publish",
  data() {
    return {
      // 课程相信信息
      courseInfo: null,
      // id
      id: null,
      saveBtnDisabled: false
    }
  },
  created() {
    // 获取路由参数
    if (this.$route.params && this.$route.params.id) {
      this.id = this.$route.params.id
      this.findDetailedInfoById()
    }
  },
  methods: {
    // 发布课程
    async issueCourse() {
      let result = await publishCourse(this.id)
      if (result.code === 20000) {
        this.$message.success("发布成功！")
        // 跳转到课程列表
        this.$router.push({path: "/course/list"})
        return  false
      }
      this.$message.error("发布课程失败，" + result.message)
    },
    // 获取课程信息
    async findDetailedInfoById() {
      let result = await findDetailedInfoById(this.id)
      if (result.code === 20000) {
        this.courseInfo = result.data
        return false
      }
      // 失败
      this.$message.error("加载信息失败，请稍后重试！")
    }
  }
}
</script>

<style scoped lang="scss">
.ccInfo {
  background: #f5f5f5;
  padding: 20px;
  overflow: hidden;
  border: 1px dashed #DDD;
  margin-bottom: 40px;
  position: relative;
}

.ccInfo img {
  background: #d6d6d6;
  width: 500px;
  height: 278px;
  display: block;
  float: left;
  border: none;
}

.ccInfo .main {
  margin-left: 520px;
}

.ccInfo .main h2 {
  font-size: 28px;
  margin-bottom: 30px;
  line-height: 1;
  font-weight: normal;
}

.ccInfo .main p {
  margin-bottom: 10px;
  word-wrap: break-word;
  line-height: 24px;
  max-height: 48px;
  overflow: hidden;
}

.ccInfo .main p {
  margin-bottom: 10px;
  word-wrap: break-word;
  line-height: 24px;
  max-height: 48px;
  overflow: hidden;
}

.ccInfo .main h3 {
  left: 540px;
  bottom: 20px;
  line-height: 1;
  font-size: 28px;
  color: #d32f24;
  font-weight: normal;
  position: absolute;
}
</style>
